“Reflection is the lamp of the heart. If it departs, the heart will have no light.”

“Wer von wenig Wissen nicht profitiert, ist weit davon entfernt, von viel Wissen zu profitieren.”

“Never have I dealt with anything more difficult than my own soul, which sometimes helps me and sometimes opposes me.”

“Filsafat yang mampu mengubah sesearang ”

“Love transforms pleasure into pain.”

“Knowledge exists potentially in the human soul like the seed in the soil; by learning the potential becomes actual.”

“Whoever says that all music is prohibited, let him also claim that the songs of birds are prohibited.”